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The Best Above-Ground Cartridge Filter Pumps of 2026 (by Pool Size — and the Name-Brand to Skip)
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- July 2026
Every “best pool pump” list ranks these by the big number on the box — and that number is a half-truth. A cartridge pump advertised at “1,500 GPH” actually pushes about 1,180 gallons an hour of real, filtered water into your pool; the “2,500 GPH” one is really 1,900. That gap is the difference between a pump that keeps your water clear and one you bought a size too small. So we settled the above-ground cartridge market the way you should actually shop it: by your pool’s size, matched to the real filtered flow — not the marketing GPH.
The short version: for most above-ground pools the Intex Krystal Clear line is the right answer, in three sizes. The only real trap is reaching for the biggest-sounding number, or grabbing the name-brand alternative that rates a full half-star lower.
The short version — best cartridge pump by pool size (real filtered flow in parentheses):
🩱 Small / soft-side, up to ~6,000 gal: Intex C1000 — 750 GPH real, comes with the cartridge, about $56. The cheapest pump that still moves real water.
🏊 The sweet spot, a typical 15–18 ft pool (~9,400 gal): Intex C1500 — 1,180 GPH real, about $72. The best water per dollar and the one most people should buy.
🌊 Larger pool, up to ~15,000 gal: Intex C2500 — 1,900 GPH real, about $130. The biggest cartridge pump before sand starts to win.
⛔ Skip: Bestway 1,500 GPH — same flow class, but 3.8★ across 375 owners and a habit of quitting after a few months.
Quick comparison
The column that decides everything is real flow — the filtered water that actually reaches your pool, which Intex lists right next to the inflated “pump flow.” Match that number to your gallons for an 8-hour turnover and you’re done.
| Model | Best for | Pump flow | Real flow | Rated pool | Cartridge | Owner rating | Price |
|---|---|---|---|---|---|---|---|
| Best water per dollar / mid-size | 1,500 GPH | 1,180 GPH (system) | Up to 9,400 gal | Type A (29000E) | 4.3★ / 8,000 | Check price → | |
| Cheapest that works / small pools | 1,000 GPH | 750 GPH (system) | Up to 6,000 gal | Type A (29000E) | 4.3★ / 22,899 | Check price → | |
| Biggest cartridge pump / larger pools | 2,500 GPH | 1,900 GPH (system) | Up to ~15,000 gal | Type B (large) | 4.4★ / 9,839 | Check price → | |
| SKIP — the name-brand that dies young | 1,500 GPH | Not published | Small–mid above-ground | Type IV / B | 3.8★ / 375 | Check price → |
Prices move constantly — tap through for today's number.
The pattern worth seeing: across the Intex line the real flow runs roughly 20–25% below the advertised pump flow — so a pump sold as “1,500 GPH” is a 1,180-GPH pump, and you size your pool on the smaller number. Everything else here is the same job (a canister pump and a Type A cartridge); the only variables that matter are how much real water it moves and how well it holds up.
The sweet spot: Intex C1500
For the pool most people actually own — a 15-to-18-foot round above-ground pool — this is the pick. It’s advertised at 1,500 GPH, but the honest, Intex-published number is 1,180 GPH of real filtered flow, which turns a 9,400-gallon pool over in about eight hours. That’s the whole job: enough real flow to keep the water clear, at the lowest price that does it. It uses the cheap, everywhere Type A cartridge, and it’s the most-recommended mid-size Intex pump for a reason — a deep, satisfied owner base at 4.3★ across 8,000 ratings.
One owner’s verified review is the honest pitch for the whole category: “Learn from my mistakes, don’t waste all your time & money this summer. Here is how I cleared my brown iron infested pool up in just 3 days!”
Not for you if: your pool is under about 6,000 gallons (the smaller, cheaper C1000 is plenty) or over about 10,000 (step up to the C2500, or move to sand). And like every cartridge pump, it trades a low sticker price for a recurring cost — you’ll swap the cartridge every couple of weeks.
Intex C1500 Krystal Clear Cartridge Filter Pump
Best water per dollar / mid-size · The sweet spot of the cartridge line for a typical 15–18 ft round pool: advertised at 1,500 GPH, but the honest number is 1,180 GPH of real filtered flow — enough to turn a 9,400-gallon pool in about 8 hours.
Your pick if you have a typical 15–18 ft round above-ground pool (up to ~9,400 gallons) and want the best water per dollar — size on the honest 1,180 GPH, not the 1,500 on the box.
Check price at Amazon →“Learn from my mistakes, don't waste all your time & money this summer. Here is how I cleared my brown iron infested pool up in just 3 days!”
Intex C1500 Krystal Clear Cartridge Filter Pump
Best water per dollar / mid-sizeYour pick if you have a typical 15–18 ft round above-ground pool (up to ~9,400 gallons) and want the best water per dollar — size on the honest 1,180 GPH, not the 1,500 on the box.
“Learn from my mistakes, don't waste all your time & money this summer. Here is how I cleared my brown iron infested pool up in just 3 days!”— Sarah B, Amazon
- 1,180 GPH real flow suits a typical 15–18 ft round pool
- The most-recommended mid-size Intex pump
- Uses the cheap, everywhere Type A cartridge
- Big proven owner base (8,000 ratings)
- Advertised '1,500 GPH' is the pump number; real filtered flow is 1,180 GPH — size on the lower figure
- Cartridge swaps every ~2 weeks (~$30–60/season)
- Rated to 9,400 gal — a big pool wants the C2500 or a sand pump
Small & soft-side pools: Intex C1000
If your pool is a smaller round or a soft-side Easy Set, you don’t need to spend more. The C1000 moves 750 GPH of real filtered flow — enough to turn a 6,000-gallon pool in about eight hours — and it comes with the cartridge to start. At around $56 it’s the cheapest pump here that actually filters a real pool (as opposed to the tiny 330- and 530-GPH units that only suit a wading pool), and it rides the biggest owner base in this roundup at 4.3★ across nearly 23,000 ratings.
A verified owner puts the appeal plainly: “Working exceptionally well in my 12’x30” round pool. It came with a filter which was nice. Hooked up and pushed water quickly. Much better flow than the one Intex sent.”
Not for you if: your pool is bigger than about 6,000 gallons — undersizing the pump is the number-one reason people fight cloudy water all summer. Move up to the C1500 the moment you’re past a small pool.
Intex C1000 Krystal Clear Cartridge Filter Pump
Cheapest that works / small poolsYour pick if you have a small or soft-side above-ground pool (up to ~6,000 gallons) and want the cheapest pump that still moves real water — about $56, comes with the cartridge.
“Working exceptionally well in my 12'x30" round pool. It came with a filter which was nice. Hooked up and pushed water quickly. Much better flow than the one Intex sent.”— E.S., Amazon
- 750 GPH of real filtered flow turns a 6,000-gal pool in ~8 hours
- Comes with the Type A cartridge to start
- Huge proven owner base (22,899 ratings) at the lowest price
- Cheap, everywhere Type A replacement cartridges
- Cartridge, not sand — swap it every ~2 weeks (~$30–60/season)
- Rated to 6,000 gal; undersized for a 15-ft-plus pool — step up to the C1500/C2500
- No wall-mount skimmer; it is a canister pump
Larger pools: Intex C2500 (and the point where sand wins)
The top of the cartridge line moves 1,900 GPH of real flow — advertised as 2,500, the biggest stated-vs-real gap in the range — which handles a pool up to about 15,000 gallons. If you want to stay on a cartridge pump for a larger above-ground pool, this is the best one.
But here’s the honest part no pump listing will tell you: this is the size where a cartridge stops being the smart choice. At 12,000-plus gallons you’re rinsing and replacing cartridges constantly, and that recurring cost adds up fast. A sand filter — where the media lasts years instead of weeks — is the better long-term buy at this size. If that’s you, read our companion guide to the best above-ground sand filter systems before you commit. (Still deciding between the two filter types? Our sand vs cartridge guide draws the line. Both are part of our above-ground pool gear hub — filters, pumps, and sizing in one place.)
A verified owner’s note also flags the one setup gotcha worth knowing: “I think it works really well, it has really high pressure. I had to get separate fittings to get it to work with my smaller hoses and holes.”
Not for you if: your pool is over about 12,000 gallons and you’ll own it for years — the cartridge-swap math tips toward sand. Buy the C2500 only if you want the simplest, cheapest-up-front option and don’t mind the upkeep.
Intex C2500 Krystal Clear Cartridge Filter Pump
Biggest cartridge pump / larger poolsYour pick if you have a larger above-ground pool (up to ~15,000 gallons) and want the biggest cartridge pump before you commit to sand — just know this is the size where sand starts to win.
“I think it works really well, it has really high pressure. I had to get separate fittings to get it to work with my smaller hoses and holes. I was able to order them easily off Amazon as well.”— Mrs. X, Amazon
- 1,900 GPH real flow handles a ~15,000-gal pool
- Largest cartridge in the Intex line
- Strong owner base (9,839 ratings)
- Advertised '2,500 GPH' vs 1,900 GPH real — the biggest stated-vs-real gap in the line
- At 12,000-gal-plus, cartridge swaps get expensive — a sand pump is the smarter long-term buy
- Larger Type B cartridge costs more than the Type A
The name-brand to skip: Bestway 1,500 GPH
Bestway is the obvious alternative — it’s the other big name in above-ground pools, its pumps fit Bestway and Coleman pools out of the box, and this one sits in the same 1,500-GPH class as the Intex C1500 for similar money. On paper it’s a fair fight. On the owner data, it isn’t: it rates 3.8★ across 375 owners — a full half-star below the Intex — and the low reviews share one theme, durability. One verified owner’s one-star review is representative: “Do not waste money on this pump! I’ve bought 3 in the past 3 years and they ALL quit working after 3-4 months.”
A single bad review is noise; a pattern of “it died in a few months” across a 375-owner base is a signal. For the same job at the same price, the Intex C1500 is the safer buy — which is exactly why it’s the SKIP here, not a runner-up.
Bestway Flowclear 1,500 GPH Filter Pump
SKIP — the name-brand that dies youngYour pick if honestly, skip it — for the same 1,500 GPH class the Intex C1500 rates a full half-star higher and costs less; this is the name-brand pick that keeps showing up in 'died in a few months' reviews.
- A real Bestway product with a deep owner base, not a white-label listing
- Fits Bestway/Coleman above-ground pools out of the box
- 3.8★ / 375 — a full half-star below the Intex C1500 (4.3★) in the same flow class
- Repeat durability complaints: owners report it quitting after 3–4 months
- Bestway does not publish a real (system) filtered-flow figure
How to size a cartridge pump (the only math that matters)
Two numbers decide it: your pool’s gallons and the pump’s real (system) flow. You want the pump to move enough water to turn the whole pool over in about 8 hours — so divide your gallons by 8 to get the GPH you need. A 9,000-gallon pool needs roughly 1,125 GPH of real flow; the C1500’s 1,180 covers it. Don’t know your gallons? Our free pool volume calculator works it out from your pool’s shape and depth.
- Always size on the real (system) flow, not the pump flow. The box lists the bigger number; the honest one is lower. Intex prints both — use the smaller.
- Oversize slightly if you’re between sizes. A little extra flow clears the water faster and buys margin on hot, busy days; an undersized pump never quite catches up.
- Budget for cartridges. Rinse every few days, replace about every two weeks — six to eight per season, roughly $30–60. That recurring cost is the real downside of cartridge filtration.
Cartridge, sand, or glass?
A cartridge pump is the right first filter for a small pool: simple, cheap up front, nothing to backwash. But it filters with a paper element you keep replacing, and once your pool gets large that gets expensive and tedious. That’s the moment to move to a sand filter — the media lasts years, and it handles a bigger pool without the constant swaps. Our guide to the best above-ground sand filter systems covers that step up, and the Pool School explainer on sand vs glass vs filter balls breaks down what to actually put in a sand filter (glass media is the upgrade most owners should make).
FAQ
What size cartridge filter pump do I need for my above-ground pool?
Match the pump's REAL (system) flow to your pool's gallons so it turns the water over in about 8 hours. The honest numbers: the Intex C1000 moves 750 GPH real and suits a pool up to about 6,000 gallons; the C1500 moves 1,180 GPH real (a typical 15–18 ft round pool, up to ~9,400 gal); the C2500 moves 1,900 GPH real (a larger pool, up to ~15,000 gal). Size on the real system-flow figure, never the bigger 'pump flow' number printed on the box.
Why is the real flow lower than the GPH on the box?
Because the box lists 'pump flow' — how much water the motor moves with no filter in the way — while the 'system flow' is how much actually reaches your pool after passing through the cartridge. Intex publishes both: the '1,500 GPH' C1500 has a real system flow of 1,180 GPH, and the '2,500 GPH' C2500 is really 1,900 GPH. It's not a defect, it's how every cartridge pump is rated — just size your pool on the smaller number.
How often do I change the cartridge, and what does it cost?
Rinse the Type A cartridge every few days and replace it about every two weeks during swim season — so figure six to eight cartridges a summer, roughly $30–60 in multipacks. That recurring cost is the real downside of cartridge filtration, and it's the main reason a larger pool is usually better off on a sand filter, where the media lasts years.
Cartridge pump or sand filter for an above-ground pool?
Cartridge for a small pool (simpler and cheaper up front, up to ~10,000 gallons); sand once you get bigger. Above about 12,000 gallons the every-two-week cartridge swaps get expensive and the constant cleaning gets old, so a sand filter system — where the media lasts years — is the smarter long-term buy. Our companion guide covers the best above-ground sand systems, and the filter-media guide explains sand vs glass vs filter balls.
Is the Bestway pump as good as the Intex?
Not on the owner data. The Bestway 1,500 GPH pump is the obvious name-brand alternative in the same flow class, but it rates 3.8★ across 375 owners versus 4.3★ for the Intex C1500, with a recurring complaint that it quits working after a few months. For the same money and the same job, the Intex is the safer buy.
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